I love that song, and I don't think as highly of Christian music as I do secular, so that's saying something. I don't know if they changed their tone because they tried to reach a non Christian audience, I don't usually listen to them. If they genuinely want to broaden their listening demographic, "I'm hurting" is going to be a lot more successful then "Praise Jesus". Not because Christians should be ashamed or unwilling to declare their love for God, but because that's something EVERYONE understands. And I really respect them for relasing something as bold as that in a mainstream Christian market.
C.S. Lewis said something along the lines of, "We don't need more Christian writers, we need more writers who are Christians." Makes sense, doesn't it? The message of what your'e saying, and being real and honest, is what's more likely to attract people to Christ, not generic praise songs.